/// <summary>
/// 判断字符串中是否包含中文
/// </summary>
/// <param name="str">需要判断的字符串</param>
/// <returns>判断结果</returns>
public static bool HasChinese(this string str)
{
  return Regex.IsMatch(str, @"[\u4e00-\u9fa5]");
}

[TestMethod()]
public void HasChineseTest()
{
  string _chineseStr1 = "你好Word";
  bool _expected1 = true;
  bool _actual1 = StringToolV2.HasChinese(_chineseStr1);
  Assert.AreEqual(_expected1, _actual1);

  string _chineseStr2 = "Hello World";
  bool _expected2 = false;
  bool _actual2 = StringToolV2.HasChinese(_chineseStr2);
  Assert.AreEqual(_expected2, _actual2);
}